| tantalite | <chemical> A heavy mineral of an iron-black colour and submetallic luster. It is essentially a tantalate of iron. Origin: Cf. F. Tantalite. Source: Websters Dictionary (01 Mar 1998) |
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| yttro-tantalite | <chemical> A tantalate of uranium, yttrium, and calcium, of a brown or black colour. Source: Websters Dictionary (01 Mar 1998) |
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